The method of claim 10 wherein said second diluent includes at least one member selected from the group consisting of compounds having the structural formula: ##STR5## wherein R is (Cn H2n+1) wherein n is an integer in the range of from about 1 to about 5;R1 is (Cm H2m+1) wherein m is O or an integer in the range of from 1 to about 4 or ##STR6## the range of from about 1 to about 4 and X is H or O